Ashridge Commons and Woods is a 640.1 hectare biological Site of Special Scientific Interest in Buckinghamshire and Hertfordshire. It is located in Little Gaddesden, and is part of the National Trust Ashridge Estate in the Chilterns Area of Outstanding Natural Beauty.
Pitstone Hill is a 22.9-hectare (57-acre) biological Site of Special Scientific Importance east of Pitstone in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and is crossed by the Ridgeway National Trail.
Bacombe and Coombe Hills is a 76.4-hectare (189-acre) biological Site of Special Scientific Interest in Upper Bacombe in Buckinghamshire. Bacombe Hill was formerly owned by Buckinghamshire County Council, which transferred it to Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust in 2014. Coombe Hill is owned by the National Trust.
Bradenham Woods, Park Wood and The Coppice is a 129.1-hectare (319-acre) biological Site of Special Scientific Interest in Bradenham in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and it is described in A Nature Conservation Review. The site is part of the Bradenham Estate, which is owned by the National Trust. It is also designated a Special Area of Conservation. Grim's Ditch, a Scheduled Monument, runs through the site.
Ellesborough and Kimble Warrens is a 68.9-hectare (170-acre) biological Site of Special Scientific Interest in Ellesborough in Buckinghamshire. The local planning authority is Wycombe District Council. It is part of the Chilterns Area of Outstanding Natural Beauty.
Gomm Valley is a 4.1-hectare (10-acre) biological Site of Special Scientific Interest in Micklefield, a district of High Wycombe in Buckinghamshire. It is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust and is part of the Chilterns Area of Outstanding Natural Beauty. The local planning authority is Wycombe District Council.
Grangelands and Pulpit Hill is a 25.5-hectare (63-acre) biological Site of Special Scientific Interest in Cadsden in Buckinghamshire. It lies within the Chilterns Area of Outstanding Natural Beauty, and the planning authorities are Wycombe District Council and Buckinghamshire County Council.
Hodgemoor Wood is a biological Site of Special Scientific Interest in Chalfont St Giles in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and most of it is leased by Buckinghamshire County Council to the Forestry Commission.
Hollowhill and Pullingshill Woods is a 23-hectare biological Site of Special Scientific Interest near Marlow in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and the Chilterns Beechwoods Special Area of Conservation. The local planning authorities are Wycombe District Council and Buckinghamshire County Council. Pullingshill Wood is owned by the Woodland Trust, and Hollowhill Wood was formerly owned by Buckinghamshire County Council, but was transferred to the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. Since November 2015 the 7.8-hectare site has been managed by the Trust as "Hog and Hollowhill Woods".
Homefield Wood is a 6.1 hectare Site of Special Scientific Interest in Hambleden in Buckinghamshire. It is owned by the Forestry Commission, and managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. It is part of the Chilterns Area of Outstanding Natural Beauty.
Ivinghoe Hills is a 210.4 hectares Site of Special Scientific Interest in Ivinghoe in Buckinghamshire, and part of the Chilterns Area of Outstanding Natural Beauty. It is listed in A Nature Conservation Review. The Ridgeway long-distance footpath ends and the Icknield Way Path starts in the site on Ivinghoe Beacon. An Iron Age fort on Ivinghoe Beacon and a tumulus on Gallows Hill are Scheduled Monuments. The site is part of the National Trust's Ashridge Estate, apart from a small area which belongs to Buckinghamshire County Council.
Lodge Hill is a 31.8-hectare (79-acre) Site of Special Scientific Interest north of Bledlow Ridge in Buckinghamshire. The local planning authorities are Wycombe District Council and Buckinghamshire County Council. The site is in the Chilterns Area of Outstanding Natural Beauty, and The Ridgeway long-distance footpath crosses it.
College Lake is a 65 hectare nature reserve in a former chalk quarry in Pitstone in the Aylesbury Vale district of Buckinghamshire. It is one of the flagship reserves of the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and it has an information centre, education facilities, a café, toilets and a shop. It is in the Chilterns Area of Outstanding Natural Beauty. The area east of the lake is a geological Site of Special Scientific Interest called Pitstone Quarry.
Aston Clinton Ragpits is a 2.9-hectare (7.2-acre) biological Site of Special Scientific Interest in Aston Clinton in Buckinghamshire. It is a former chalk quarry, which is now a nature reserve managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. It is in the Chilterns Area of Outstanding Natural Beauty.
Swain's Wood is a 16.2-hectare (40-acre) biological Site of Special Scientific Interest west of Turville in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.
Weston Turville Reservoir is a 19 hectare biological Site of Special Scientific Interest south of Weston Turville in Buckinghamshire. It is owned by the Canal & River Trust, and the open water is leased to sailing and fishing clubs while the surrounding land is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. The site is in the Chilterns Area of Outstanding Natural Beauty.
Wormsley Chalk Banks are six separate areas which together are a 14.1-hectare (35-acre) biological Site of Special Scientific Interest near Turville in Buckinghamshire and Oxfordshire. The site is in the Chilterns Area of Outstanding Natural Beauty.
Buttlers Hangings is a 3.9 hectare Site of Special Scientific Interest north of West Wycombe in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty.
